diff --git a/apps/ai-game-creator-shell/tests/appSurface.test.ts b/apps/ai-game-creator-shell/tests/appSurface.test.ts
index c316040c1..af1fb7717 100644
--- a/apps/ai-game-creator-shell/tests/appSurface.test.ts
+++ b/apps/ai-game-creator-shell/tests/appSurface.test.ts
@@ -12,12 +12,21 @@ import {
   within,
 } from '@testing-library/react';
 import React from 'react';
-import { afterEach, describe, expect, it, vi } from 'vitest';
+import { afterEach, beforeEach, describe, expect, it, vi } from 'vitest';
 
 const nativeClipboardMock = vi.hoisted(() => ({
   text: '',
 }));
 
+const originalCreateObjectUrl = Object.getOwnPropertyDescriptor(
+  URL,
+  'createObjectURL',
+);
+const originalRevokeObjectUrl = Object.getOwnPropertyDescriptor(
+  URL,
+  'revokeObjectURL',
+);
+
 vi.mock('@tauri-apps/plugin-clipboard-manager', () => ({
   readImage: vi.fn(async () => {
     throw new Error('no native clipboard image');
@@ -102,6 +111,19 @@ function mockRoleAgentReply() {
   return roleAgentMockReply;
 }
 
+beforeEach(() => {
+  Object.defineProperties(URL, {
+    createObjectURL: {
+      configurable: true,
+      value: vi.fn(() => 'blob:mock-attachment-preview'),
+    },
+    revokeObjectURL: {
+      configurable: true,
+      value: vi.fn(),
+    },
+  });
+});
+
 afterEach(() => {
   cleanup();
   nativeClipboardMock.text = '';
@@ -109,6 +131,17 @@ afterEach(() => {
   window.localStorage?.clear();
   delete window.__TAURI__;
   vi.restoreAllMocks();
+
+  if (originalCreateObjectUrl) {
+    Object.defineProperty(URL, 'createObjectURL', originalCreateObjectUrl);
+  } else {
+    Reflect.deleteProperty(URL, 'createObjectURL');
+  }
+  if (originalRevokeObjectUrl) {
+    Object.defineProperty(URL, 'revokeObjectURL', originalRevokeObjectUrl);
+  } else {
+    Reflect.deleteProperty(URL, 'revokeObjectURL');
+  }
 });
 
 describe('AI 游戏创作 App 界面边界', () => {
@@ -1617,6 +1650,9 @@ describe('AI 游戏创作 App 界面边界', () => {
     });
 
     expect(await screen.findByText('reference.png')).not.toBeNull();
+    expect(
+      screen.getByRole('img', { name: 'reference.png' }).getAttribute('src'),
+    ).toBe('blob:mock-attachment-preview');
 
     fireEvent.click(screen.getByRole('button', { name: '开启创作' }));